T-Set with Dual Valves, Injection Site, Clamps, Luer Slip. Stasis valve – The neutral displacement stasis valve prevents blood reflux into the catheter when connecting and disconnecting syringes/lines. Does not require clamping to control valve induced reflux. closed, needle free valve with a flat, swabable top for easy disinfecting. Saline flush option reduces risk, cost, and time associated with Heparin use. (Heparin not required). Higher flow rate than microclave.